CN115744628A - Lower limiting device of steel wire rope - Google Patents

Abstract

The invention provides a lower limiting device of a steel wire rope, which is used for carrying out lower limiting detection on the steel wire rope wound on a winding drum, and comprises a support, a compression roller, a spring device and a travel switch, wherein the support is arranged on two sides of the compression roller, the spring device is arranged on two sides of the compression roller, one end of the spring device is connected with the support, the other end of the spring device is connected with one end of the compression roller, the support is respectively connected with two ends of the compression roller through the spring device, the travel switch is arranged on the support on one side of the compression roller, the spring device is movably arranged between the travel switch and two ends of the compression roller, the spring device comprises a spring, the compression roller is attached to the winding drum when the spring is in a natural state, the travel switch works, one end of the travel switch is connected with the spring device to trigger the travel switch when the spring is compressed, two sides of the compression roller are provided with inclined parts which are inclined upwards and inwards, and the included angle between the inclined surfaces of the inclined parts and the surface of the compression roller is 15-20 degrees; in the descending process of the steel wire rope, the lower limit position of the steel wire rope can be detected, the structure is simple, the detection accuracy is high, and the operation efficiency is improved.

Description

Lower limiting device of steel wire rope

Technical Field

The invention relates to the technical field of limiting devices for cranes, in particular to a lower limiting device for a steel wire rope.

Background

At present, in an actual crane lifting operation process, a crane lifting device is used for lifting or lowering goods and is an important mechanism in a crane, and the working performance of the crane lifting device directly influences the working performance of the whole crane. When the crane lifting equipment runs to the descending limit position, the power source is automatically cut off and the crane lifting equipment stops moving, so that the lifting limit function of the lifting mechanism is realized, and the lifted goods and the crane are prevented from being damaged. For example, the chinese patent application No. CN202022547910.5, published as 2021.07.20, which relates to the technical field of crane hoisting mechanisms, includes a drum wrapped with a steel wire rope and a wall frame for supporting the drum, and further includes a spring, one end of the spring is fixed on the wall frame, the other end of the spring is fixed with a pressure roller shaft, one end of the pressure roller shaft is rotatably connected with a pressure roller, the spring is used for providing an initial pre-tightening tension, so that the pressure roller is always pressed on the steel wire rope of the drum; the middle of the compression roller shaft is connected with one end of a connecting rod, and the other end of the connecting rod is connected with a connecting rod shaft and a detection rod respectively. The two photoelectric proximity switches of the hoisting mechanism are used for respectively detecting that the steel wire rope of the hoisting mechanism moves to two limit positions of lifting and descending, and compared with a mechanical travel switch, the photoelectric proximity switch has better positioning precision, operating frequency, service life, convenience in installation and adjustment and adaptability to severe environment than the mechanical travel switch. The lower limit position of the mechanism is realized by arranging a connecting rod in the middle of the compression roller, the connecting rod is required to drive the detection rod to rotate around a connecting rod shaft and be connected with a preset lower limit position to realize the determination of the lower limit position, the lower limit position is required to be respectively arranged, the connecting rod is required to be arranged in the middle of the compression roller, the structure is complex, the lower limit position is realized by driving the connecting rod to rotate by the compression roller, so that the center of the head of the detection rod is superposed with two proximity switches in the rotating process to realize position detection, the compression roller drives the compression roller to move in the ascending and descending processes of the steel wire rope, if the steel wire rope is wound and unwound too fast, the compression roller instantly rotates to cause the detection rod to swing too fast to cause detection errors, and meanwhile, when the compression roller tightly presses the surface of the winding drum, the compression roller is provided with steps, and the steel wire rope is clamped on the steps of the compression roller to cause the compression roller to be incapable of lifting, so that the lifting operation efficiency of the equipment is influenced.

Disclosure of Invention

The invention aims to provide a lower limiting device of a steel wire rope, which can detect the lower limiting position of the steel wire rope in the descending process of the steel wire rope, has a simple structure and high detection accuracy, and improves the operation efficiency.

In order to achieve the purpose, the lower limiting device of the steel wire rope is used for carrying out lower limiting detection on the steel wire rope wound on a winding drum, and comprises a support, a compression roller, a spring device and a travel switch, wherein the support is installed on two sides of the compression roller, the spring device is arranged on two sides of the compression roller, one end of the spring device is connected with the support, the other end of the spring device is connected with one end of the compression roller, the support is respectively connected with two ends of the compression roller through the spring device, the travel switch is arranged on the support on one side of the compression roller, the spring device is movably arranged between the travel switch and two ends of the compression roller, the spring device comprises a spring, the compression roller is attached to the winding drum when the spring is in a natural state, the travel switch works, one end of the travel switch is connected with the spring device to trigger the travel switch to be out of work, two sides of the compression roller are provided with inclined parts which are inclined upwards and inwards, and the included angle between the inclined surfaces of the inclined parts and the compression roller body is 15-20 degrees.

According to the arrangement, the spring devices are arranged on the two sides of the compression roller, when the compression roller is tightly attached to the surface of the winding drum, the travel switch works, namely, the steel wire rope reaches the lower limit position; the travel switch is arranged on the support on one side of the compression roller, when the steel wire rope is wound, the steel wire rope enters the groove corresponding to the winding drum from the inclined part, so that the lifting of the induction compression roller is realized, the compression roller is lifted to drive the spring of the spring device to be compressed, so that the travel switch does not work, the rope winding work is continued, when the steel wire rope is unwound, the steel wire rope slides out of the groove on the winding drum from the inclined part, the state that the compression roller is attached to the winding drum is recovered due to the fact that no steel wire rope exists between the compression roller and the winding drum, and whether the steel wire rope reaches the lower limit position or not is identified when the steel wire rope is not wound on the winding drum, travel switch work triggers simultaneously makes the reel out of work, and then realize that the reel no longer puts the rope, only through lifting up and pushing down of a compression roller and two spring assembly through the compression roller realize the detection of wire rope's lower limit position, moreover, the steam generator is simple in structure, and because be provided with the rake in the both sides of compression roller, thereby make things convenient for wire rope to pass through the rake and get into or hold the inslot of wire rope on the roll-off reel, also prevent when improving the operating efficiency because wire rope receive and releases the untimely problem emergence that leads to limit position to detect, through setting up above contained angle, one conveniently can make things convenient for receiving and releasing of wire rope, also can make the thinner of compression roller skin do simultaneously, lighten the weight of compression roller.

Furthermore, the number of the supports is more than two, and the supports comprise a first support and a second support, the first support and the second support are respectively arranged on two sides of the press roll, the first support and the second support are arranged in parallel, and the first support and the second support are fixedly arranged on a steel plate through bolts.

The arrangement is that the support is arranged on two sides of the compression roller, and the support can be used for installing and connecting the spring device and the travel switch.

Further, the compression roller comprises a compression roller body and a compression roller skin, bearings are arranged at two ends of the compression roller body, the rotating shaft penetrates through the bearings inside the compression roller body, two ends of the rotating shaft are respectively connected with one end of the spring device, and the compression roller skin is fixed on the surface of the compression roller body through screws.

According to the arrangement, the bearings are arranged at the two ends of the pressing roller body, so that the rotating shaft penetrates through the inside of the pressing roller body through the bearings, and the rotation of the pressing roller can be realized; the press roller is connected with one end of the spring device through the rotating shaft, and when the steel wire rope is not wound on the winding drum, the press roller can be tightly pressed on the surface of the winding drum.

Further, the compression roller skin includes compression roller skin main part, and the rake sets up the both sides in compression roller skin main part, the cross section of compression roller skin is circular, the cross section of compression roller body is circular, the one end of rake with compression roller body surface connection, the other end of rake with compression roller skin surface connection, the cross section radius of compression roller skin main part is greater than the radius of compression roller body cross section.

Above setting, the both ends through the compression roller skin are provided with the rake respectively, and at wire rope in-process that rises, the wire rope of being convenient for gets into the compression roller below and lifts up the compression roller from the compression roller both ends homeomorphism, makes compression roller and reel separate, has avoided wire rope to block on the step of compression roller and unable lifting compression roller to improve the operating efficiency.

Further, spring assembly has more than two, and parallel arrangement the both sides of compression roller, spring assembly includes guide holder, spacer, vaulting pole, spring and vaulting pole seat, the guide holder passes through the bolt fastening on the support, keep away from on the guide holder the one end of support is provided with the through-hole, the spacer sets up the both ends of through-hole on the guide holder, the vaulting pole passes through-hole on the guide holder, the one end of vaulting pole with vaulting pole seat fixed connection, the other end of vaulting pole pass through the steel sheet with travel switch's one end fixed connection, the spring housing the vaulting pole with the one end that the compression roller bearing end is connected, the one end of spring with the guide holder is connected, the other end of spring with the vaulting pole seat is connected.

Above setting is connected with the vaulting pole seat through setting up the vaulting pole to set up the one end that the spring housing is connected at vaulting pole and vaulting pole seat, when the reel does not twine wire rope, can make the compression roller reset, make the compression roller sticiss on the reel surface, the identification is wire rope arrival lower limit position.

Furthermore, one end of the travel switch is connected with the support rod of the spring device through a steel plate, and the other end of the travel switch is fixed on the support through a bolt.

Above setting, be connected through the vaulting pole that sets up travel switch and spring assembly, can make wire rope arrive lower limit position's signal transmission for control system, and then the control reel can't transfer the action.

Furthermore, the strut seat comprises a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are perpendicularly arranged, a strut mounting hole is formed in the position, corresponding to the strut, of the first fixing plate, one end of the strut is fixedly mounted in the strut mounting hole, a limiting bolt is arranged at the other end of the strut, a rotating shaft mounting hole is formed in the second fixing plate, and a limiting column is arranged on one side of the rotating shaft mounting hole.

The utility model discloses a compression roller, including the vaulting pole, the vaulting pole seat is fixed on the vaulting pole seat through the spacing post, then the one end of pivot is fixed on the vaulting pole seat through the spacing post, thereby make the pivot can not rotate, and be provided with the bearing between pivot and compression roller, thereby the compression roller can rotate, thereby reduce the friction between reel and the compression roller, when the compression roller is lifted in addition, the vaulting pole seat is lifted then the vaulting pole rebound realizes contacting with travel switch, spacing bolt on the vaulting pole other end breaks away from with the guide holder when preventing the vaulting pole from the rebound, and structural stability is good.

Drawings

Fig. 1 is a front view of the present invention in connection with a portion of a roll.

Fig. 2 is a side view of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Reference numerals are as follows: 1. a first bracket; 2. pressing a roller skin; 3. pressing a roller body; 4. a rotating shaft; 5. a guide seat 6 and a spacer bush; 7. a stay bar; 8. a steel plate; 9. a second bracket; 10. a backing plate; 11. a bearing; 12. a spring; 13. a strut seat; 14. an inclined surface; 15. pressing the surface of the roller body; 16. pressing the surface of the roller skin; 17. a travel switch; 131. a first fixing plate; 132. and a second fixing plate.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and the detailed description.

As shown in fig. 1-3, an embodiment of the present invention provides a lower limiting device for a steel wire rope, which is used for performing lower limiting detection on the steel wire rope wound on a drum, and includes a bracket, a compression roller, a spring device, and a travel switch 17, where the bracket includes a first bracket 1 and a second bracket 9, the first bracket 1 and the second bracket 9 are arranged in parallel on two sides of the compression roller, one end of the first bracket 1 and one end of the second bracket 9 are respectively fixedly mounted on a backing plate 10 through bolts, the other end of the first bracket 1 is used for mounting and connecting the spring device, and the other end of the second bracket 9 is used for mounting and connecting the spring device and the travel switch 17; in this embodiment, as shown in fig. 1, two spring devices are provided, and two sides of the compression roller are arranged in parallel, each spring device includes a guide seat 5, a spacer 6, a stay bar 7, a spring 12 and a stay bar seat 13, the guide seats 5 are respectively fixedly mounted on a first bracket 1 and a second bracket 9 through bolts, one end of each guide seat 5, which is far away from the first bracket, is provided with a through hole, the spacer 6, which is matched with the through hole, is respectively mounted at two ends of the through hole, the stay bar 7 of the spring device mounted on the second bracket 9 passes through the through hole on the guide seat 5, one end of the stay bar 7 passes through the spring 12 and is fixedly connected with the stay bar seat 13, the other end of the stay bar 7 is fixedly connected with the lower surface of the steel plate 8, one end of the stay bar 7 of the spring device mounted on the first bracket 1 passes through the hole on the guide seat 5, and then passes through the spring 12 and is directly connected with the stay bar seat 13 in a sliding manner along the length direction of the stay bar 7; travel switch's one end and the upper surface connection of steel sheet 8, travel switch 17's the other end passes through bolt fixed mounting on support 9, can make wire rope reach the signal transmission of low limit position for control system, and then control system control reel can't transfer the action, and control system controls the reel after receiving the signal and can't transfer the theory of operation of action for prior art, no longer describes here.

As shown in fig. 3, the stay bar seat 13 includes a first fixing plate 131 and a second fixing plate 132, the first fixing plate 131 and the second fixing plate 132 are vertically disposed, a mounting hole matched with the stay bar 7 is disposed at a position corresponding to the stay bar 7 on the first fixing plate 131, one end of the stay bar 7 is fixedly mounted in the mounting hole of the stay bar 7, in this embodiment, the stay bar 7 is disposed in the mounting hole in an interference fit manner, so that the stay bar 7 and the stay bar seat 13 are fixedly connected, one end connected to the lower surface of the steel plate 8 is provided with a limiting bolt, the second fixing plate 132 is provided with a mounting hole for the rotating shaft 4, and a limiting column is disposed on the left side of the mounting hole for the rotating shaft 4.

In this embodiment, as shown in fig. 1 and fig. 3, the compression roller includes a compression roller body 3 and a compression roller skin 2, two ends of the compression roller body 3 are provided with bearings 11, a rotating shaft 4 passes through the inside of the compression roller body 3 through the bearings 11, two ends of the rotating shaft 4 are respectively connected with a rotating shaft mounting hole of a second fixing plate 132 of a strut seat 13, the compression roller skin 2 includes a compression roller skin main body, the compression roller skin 2 is fixed on the outer surface of the compression roller body 3 through screws, thereby facilitating replacement of the compression roller skin 2, two ends of the compression roller skin main body are respectively provided with an inclined part, one end of the inclined surface 14 of the inclined part is connected with a compression roller body surface 15, the other end of the inclined surface 14 of the inclined part is connected with a compression roller skin surface 16, the cross section of the compression roller skin 2 is circular, the cross section of the compression roller body 3 is circular, the cross section radius of the compression roller skin 2 is greater than that of the compression roller body 3, because two ends of the compression roller skin 2 are respectively provided with an inclined part, in the ascending process of a wire rope, it is convenient for the wire rope to enter the compression roller from two ends of the compression roller to go down and lift the compression roller, thereby separating the compression roller from the compression roller and lifting the compression roller, thereby improving the operation efficiency.

The working principle of the device is as follows: when the steel wire rope is not wound on the winding drum, the compression roller is tightly pressed on the surface of the winding drum, the travel switch is in an unfired state at the moment, the travel switch transmits a signal to the control system, and the condition that the steel wire rope reaches the lower limit position is identified, the winding drum cannot perform lowering action, and can perform lifting action; when the steel wire rope is wound on the winding drum, the inclined parts are respectively arranged at the two ends of the pressing roller skin 2, in the ascending process of the steel wire rope, the steel wire rope conveniently enters the lower portion of the pressing roller from the two ends of the pressing roller and lifts the pressing roller, the pressing roller is separated from the winding drum, the pressing roller is jacked by the steel wire rope to a certain height, the spring device connected with the pressing roller triggers the travel switch, the travel switch transmits a signal to the control system, the steel wire rope is identified to not reach the lower limiting position, and the winding drum can normally run.

Claims (7)

1. The utility model provides a wire rope's lower stop device for carry out lower limit detection to the wire rope of winding on the reel, including the support, its characterized in that: the compression roller support is characterized by further comprising compression rollers, spring devices and travel switches, wherein the support is installed on two sides of the compression rollers, the spring devices are arranged on two sides of the compression rollers, one ends of the spring devices are connected with the support, the other ends of the spring devices are connected with one ends of the compression rollers, the support is respectively connected with two ends of the compression rollers through the spring devices, the travel switches are arranged on the support on one side of the compression rollers, the spring devices are movably arranged between the travel switches and two ends of the compression rollers, the spring devices comprise springs, the compression rollers are attached to the winding drum when the springs are in a natural state, the travel switches work, one ends of the travel switches are connected with the spring devices to trigger the travel switches to be out of work when the springs are compressed, inclined portions which are inclined upwards and inwards are arranged on two sides of the compression rollers, and included angles between the inclined surfaces of the inclined portions and the surfaces of the compression roller bodies are 15-20 degrees.

2. A lower restraint device for a steel cord according to claim 1, characterized in that: the number of the supports is more than two, the supports comprise a first support and a second support, the first support and the second support are respectively arranged on two sides of the press roll, the first support and the second support are arranged in parallel, and the first support and the second support are fixedly arranged on a steel plate through bolts.

3. A lower restraint device for a steel cord according to claim 1, characterized in that: the compression roller comprises a compression roller body and a compression roller skin, bearings are arranged at two ends of the compression roller body, a rotating shaft penetrates through the bearings inside the compression roller body, two ends of the rotating shaft are connected with one end of the spring device respectively, and the compression roller skin is fixed on the surface of the compression roller body through screws.

4. A lower restraint device for a steel cord according to claim 3, characterized in that: the compression roller leather comprises a compression roller leather main body, the inclined part is arranged on two sides of the compression roller leather main body, the cross section of the compression roller leather is circular, the cross section of the compression roller body is circular, one end of the inclined part is connected with the surface of the compression roller body, the other end of the inclined part is connected with the surface of the compression roller leather, and the cross section radius of the compression roller leather main body is larger than the radius of the cross section of the compression roller body.

5. A lower restraint device for a steel cord according to claim 3, characterized in that: spring assembly has more than two, and parallel arrangement the both sides of compression roller, spring assembly includes guide holder, spacer, vaulting pole, spring and vaulting pole seat, the guide holder passes through the bolt fastening on the support, keep away from on the guide holder the one end of support is provided with the through-hole, the spacer sets up the both ends of through-hole on the guide holder, the vaulting pole passes through-hole on the guide holder, the one end of vaulting pole with vaulting pole seat fixed connection, the other end of vaulting pole pass through the steel sheet with travel switch's one end fixed connection, the spring housing is in the vaulting pole with the one end that compression roller bearing end is connected, the one end of spring with the guide holder is connected, the other end of spring with the vaulting pole seat is connected.

6. A lower restraint device for a steel cord according to claim 1, characterized in that: one end of the travel switch is connected with a support rod of the spring device through a steel plate, and the other end of the travel switch is fixed on the support through a bolt.

7. A lower restraint device for a steel cord according to claim 1, characterized in that: the strut seat comprises a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are arranged perpendicularly, strut mounting holes are formed in the positions, corresponding to the struts, of the first fixing plate, one ends of the struts are fixedly mounted in the strut mounting holes, limiting bolts are arranged at the other ends of the struts, rotating shaft mounting holes are formed in the second fixing plate, and limiting columns are arranged on one sides of the rotating shaft mounting holes.

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